scholarly journals Synthesis and Properties of Highly Conducting Natural Flake Graphite/Phenolic Resin Composite Bipolar Plates for Pem Fuel Cells

2016 ◽  
Vol 25 (4) ◽  
pp. 096369351602500 ◽  
Author(s):  
Rajeev K. Gautam ◽  
Kamal K. Kar
Keyword(s):  
Fuel Cells ◽  
Phenol Formaldehyde ◽  
Resin Composite ◽  
Composite Plates ◽  
Pem Fuel Cells ◽  
Molding Pressure ◽  
Formaldehyde Resin ◽  
Mechanical And Thermal Properties ◽  
Flake Graphite ◽  
Bipolar Plates

Electrically conductive composite bipolar plates consisting of resole-typed phenol formaldehyde resin and natural flake graphite (NFG) have been fabricated by compression molding technique at room temperature. The aim of this study is to investigate the effects of NFG content, molding pressure, and nano-sized carbon black (NCB) on the properties of composite bipolar plates. The NFG/resin composite plates have been studied for various properties including electrical, mechanical, and thermal properties. It has been observed that the composite plates prepared at NFG content of 45 wt%, NCB content of 4.5 wt%, and molding pressure of 15 MPa have optimum properties. Under optimal conditions, bipolar plates showed better properties at bulk density 1.79 g/cc, electrical conductivity 358 S/cm, flexural strength 29.3 MPa, compressive strength 43.6 MPa, water absorption 0.34% and surface microhardness 72.6 HV. Additionally, the plates were thermally stable up to 300°C. Hence, NFG/resin composites successfully fulfil the DOE-2015 requirements for bipolar plates in PEM fuel cells.

PVD Coated Bipolar Plates for PEM Fuel Cells

2005 ◽  
Vol 2 (4) ◽  
pp. 290-294 ◽  
Author(s):  
Shuo-Jen Lee ◽  
Ching-Han Huang ◽  
Yu-Pang Chen ◽  
Chen-Te Hsu
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Physical Vapor Deposition ◽  
Corrosion Current ◽  
Pem Fuel Cells ◽  
Bipolar Plates ◽  
Coating Materials ◽  
Pvd Coating ◽  
Simulated Fuel

Aluminum was considered a good candidate material for bipolar plates of the polymer electrolyte membrane (PEM) fuel cells due to its low cost, light weight, high strength and good manufacturability. But there were problems of both chemical and electrochemical corrosions in the PEM fuel cell operating environment. The major goals of this research are to find proper physical vapor deposition (PVD) coating materials which would enhance surface properties by making significant improvements on corrosion resistance and electrical conductivity at a reasonable cost. Several coating materials had been studied to analyze their corrosion resistance improvement. The corrosion rates of all materials were tested in a simulated fuel cell environment. The linear polarization curve of electrochemical method measured by potentiostat instrument was employed to determine the corrosion current. Results of the corrosion tests indicated that all of the coating materials had good corrosion resistance and were stable in the simulated fuel cell environment. The conductivities of the coated layers were better and the resistances changed very little after the corrosion test. At last, single fuel cells were made by each PVD coating material. Fuel cell tests were conducted to determine their performance w.r.t. that was made of graphite. The results of fuel cell tests indicated that metallic bipolar plates with PVD coating could be used in PEM fuel cells.

Composite-coated aluminum bipolar plates for PEM fuel cells

2013 ◽  
Vol 231 ◽  
pp. 106-112 ◽  
Author(s):  
Jennifer R. Mawdsley ◽  
J. David Carter ◽  
Xiaoping Wang ◽  
Suhas Niyogi ◽  
Chinbay Q. Fan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Pem Fuel Cells ◽  
Bipolar Plates

Carbon-based materials for bipolar plates for low-temperatures PEM fuel cells — A review

2019 ◽  
Vol 12 (02) ◽  
pp. 1930001 ◽  
Author(s):  
Renata Wlodarczyk
Keyword(s):  
Fuel Cells ◽  
Carbon Nanomaterials ◽  
Carbon Materials ◽  
Pem Fuel Cells ◽  
Basic Material ◽  
Bipolar Plates ◽  
Diffusion Layers ◽  
Hydrogen Technology ◽  
Materials Used ◽  
Exchange Membrane

The PEMFC (Polymer Exchange Membrane Fuel Cell) is one of the most researched generators in hydrogen technology. The PEMFCs offer low emissions, several applications in industry with high power density. The basic material for the construction of components in low-temperature fuel cells is carbon or its allotropic forms and carbon nanomaterials. Carbon materials are used to build diffusion layers of electrodes, as catalyst carriers, for the construction of covers/interconnectors and as fuel. In this work, the carbon materials used to build a single cell have been reviewed taking into account various methods of fabrication and modification of materials.

Synthesis and characterization of boron and phosphorus-containing phenol formaldehyde resin-modified polyurethane composites

2020 ◽  
Vol 10 (7) ◽  
pp. 1057-1067
Author(s):  
Kuo-Hui Wu ◽  
Je-Chuang Wang ◽  
Min-Jhong Jheng ◽  
Yin-Chiung Chang
Keyword(s):  
Corrosion Protection ◽  
Phenol Formaldehyde ◽  
Salt Spray ◽  
Sol Gel ◽  
Composite Films ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Mechanical And Thermal Properties ◽  
Gravimetric Analysis ◽  
Phosphorus Containing

Composite films with polyurethane (PU), phenol formaldehyde resin (PFR) and boron, phosphorus-containing phenol formaldehyde resins (P-PFR and B, P-PFR), were synthesized using sol–gel and copolymerization techniques. These composite films were deposited via spin-coating onto an aluminum alloy (AA) for improve the corrosion protection. The effects of different types of PFR on the structural, thermal and mechanical properties and corrosion resistance of the composites were investigated. The structures and morphologies of the composites were investigated by the gel permeation chromatography (GPC), Fourier transform infrared (FTIR), scanning electronic microscopy (SEM) and atomic force microscopy (AFM). It was shown from the dynamic mechanical analysis (DMA) and thermal gravimetric analysis (TGA) that the mechanical and thermal properties of PU were improved by incorporation of PFR, P-PFR and B, P-PFR. In addition, the PU/PFR composites provided an excellent corrosion protection in comparison with PU according to potentio-dynamic and salt-spray analyses.

Sign in / Sign up

Export Citation Format

Share Document